Troubleshooting
4-78 Samsung Electronics
4-4-35 MCU branch part setup error – Connect an Indoor unit to a branch part not being used
1. How to check
Check the actual use of the branch part. If it is used, turn on the Dip switch for branch part setup. After completing resetting, press
the outdoor unit's K3 button to reset or turn off to restart.
MCU BOX #1
MCU PCB
OFF
MCU address setup
ON
Indoor unit
Indoor unit address
Branch part use setup
4 4 2 1 5 6
0
Branch A
4
B
C D E
5
F
62
Outdoor unit display
Indoor unit display
×
(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter)
×
(Defrost)
Criteria • Occurs when MCU PIPE is turned off, yet an indoor unit is registered
Cause of problem • Indoor unit connection to the unused branch part
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